Weft-replenishing mechanism for looms



Sept. 23. 1924. 1,509,449

E. s. STIMPSQN WEFT REPLENISHING MECHANISM FOR LOOMS Filed April 17,, 192?. 2 Sheets-Sheet. 1

. l A i F W FIG; 2 Z2 5 w I 1,509,449 E. s. STIMPSON WEFT REPLENISHING MECHANISM FOR LOOMS Sept. 23 1924.

Filed April 17, 1922 2 Sheets-Sheet 2 F|s.3. 2 20 25 1 FIG. 4.

Patented Sept. 23, 1924.

UNITED STATES EDWARD S. STIMPSON, OF I'IOPEDALE, MA PORATION, OF HOPEDALE, MASSAGE SSACI-IUSETTS, ASSIGNOR TO DRAPER COR- USE'ITS, A CORPORATION OF MAINE.

WEFT-REPLENISHING MECHANISM FOR LOOMS.

Application filed April 17, 1922. Serial No. 553,341.

To all whom it may concern:

Be it known that I, EDWARD S. STIMrsoN, a resident of Hopedale, in the county of Worcester and State of Massachusetts, have invented an Improvement in Weft- Replenishing Mechanism for Looms, of which the following is a specification.

The present improvement has reference to weft replenishing looms of the well known Northrop type wherein a rotary hopper or magazine carries a large number of bobbins which are transferred one by one into th running shuttle as the running weft becomes exhausted sufficiently to demand replenishment. So much of the Northrop loom as is necessary for an understanding of the present invention is illustrated in United States Letters Patent of Cobb & Adkins No. 648,898, May 1, 1900, and of Stimpson No. 664,790, December 25, 1900. As shown in each of these patents, a yielding bobbin head support is located in the path of the foremost bobbin in the hopper or magazine as said bobbin is transferred from the magazine into the shuttle, as indicated in Fig. 2 of said Patent No. 648,898. This yielding bobbin head support, as shown in said patents, is pivoted directly to the fixed stand secured to the breast beam of the loom upon which the magazine or hopper is rotatively mounted. The bobbin head support is subjected to a severe strain as the bobbin is being transferred, and this strain is transmitted to the stand upon which the bobbin head support is pivoted. This results in occasional breakage of a stand, thus necessitating the dismounting of the magazine and the substitution of an entirely new stand in order that the replenishing mechanism may continue to func tion.

The object of the present invention is to avoid this difiiculty. In accordance with the present invention, the yielding bobbin head support is pivotally mounted upon an independent bracket which is detachably fastened to the magazine stand. Hence, if breakage occurs due to the shock of the bobbin transfer transmitted to the bobbin head support, only this bracket is broken and it can be replaced by a new one without removing the magazine or its stand from the loom. The pivot stud for the bobbin head support is fastened to this independent removable bracket by a headed pin, and

when the bracket is in place on the stand the head of the pin is located immediately beneath a portion of the stand so that it is impossible for it to ar loose. This bracket is fitted to the stand so that the stand withstands the strains imparted to the bracket thereby relieving the attaching devices from shock.

The present improvements are illustrated the accompanying drawings, wherein- Figure 1 is a view of the inner side of a portion of the magazine supporting stand showing the removable bracket and bobbin head support in place, the point of view from which these parts are seen being from the middle of the loom. Fig. 2 is a side view looking in the opposite direction from that in which Fig. 1 is seen. Fig. 3 is a view of the outer side of the removable bracket detached, looking at it in the oppo-- site direction from that in which Fig. 1 is seen. Fig, 4 is an edge view of the bracket. Fig. 5 is a section in the plane indicated by the line 5-5 in Fig. 2.

The magazine stand A, is-fixed to the breast beam of the loom in the usual way, and it has on its outer face (Fig. 2) the usual lateral ledge or guard B, which prevents premature radial displacement of the bobbins C, carried by the rotary magazine D. As shown in Fig. 2, the foremost bobbin which bears against the usual fixed stop E, on the stand A. is directly above the bobbin head support F. This bobbin head support a F, turns on a fixed stud G, and is yieldingly maintained in its normal. elevated position shown in Fig. 2 by a spring I-I, shown in Fig. 1. In all of these respects, the illustrated mechanism is substantially that shown in the aforesaid Patent N 0. 664,790.

In accordance with the present invention, this stud G, is not carried by the stand A, but it is secured to an independent bracket 10, by means of a headed pin 11, which extends .centrally through the stud G, as shown in Figs. 2 and 5.

This bracket 10, is detachably but securely fixed to the stand A. The body of the bracket conforms in curvature to the curves of the stand. On its inner face (that is, toward the cloth) the stand has a recess 14; bounded at its top by a transverse shoulder 15 and at its bottom by an inclined shoulder 16. The bottom face of this recess has a transverse groove 13 open at its rear end.

its outer face which fits within the groove A t its. bottom the: stand has a recess: terminating at its front in? a vertical shoulder 22 and lat itsrear-in an inclined shoulder 32 (Figsirl and2l) substantially parallel with the inclined sh'oulderlfii At its extreme lower end the bracket has ani flange 20 which fits thebottomsurfaee of the-istand between theshoulders 22 and 32,

as-showni-in Figs: 1, 2. and v5. The bearing 19, at=its fronthas'ia: fiat vertical face 21 which seats against the vertical shoulder 22 on the stand. The rear face of the end 31 (Fig.3) of the flange- 20 is inclined and fits against the "shoulder 32"of the stand.

The-ibracket is secured'to the stand by bolts 24, and nuts 25, the bolts passing through holes-23 in the bracket. The interfitting parts of the bracket and stand serve to maintain'the bracket definitely in place and to relieve thebolts 24, from any injurious strain or shock.- The interfitting parts of the bracket and stand are disposed so astoltransmitto the stand all up, down, forward and backward strains bracket due to the movement ofthe yielding bobbin head support. Downward movement of'the bracketiis:prevented by the rib 12 fitting in groove 13- ofthe stand to which efi'ect also'the interfitting face of the flange 18 of the "bracket and theshoulder 16 of the stand contribute. Upward movement of the braeket isprevented the: shoulder 15 andrgroove 13of1the stand and also by the bottom of the stand above the'flange 20-of thewbrack et. Frontward movement of the bracket iis prevented by the shoulders 16' and 22 of'the. stand. Rear-Ward movement of the bracket is preventedibyshoulder 32 of the stand; At' thersame time by simply removing the nuts 25, the I bracket can be easilyremovedin case it becomes broken. This removal and the replacement'of a new bracket can be effected without removing the stand or the J magazine: from the 100111.

The flangeQO of thebraeket is shaped at its{ margin 216 to: constitute a. continuation of theledge- 'orf guard B; of the: stand, as indicated: in t Fig; 2; .thereby preventing any accidental radial displacement of I the on the bins after they leave theguard B. As shown in Fig. 5, the b88412? of the pin 11 is at the upper surface of the flange 20 just beneath the part of the lower margin of the stand A, beneath which said flange extends. \Vhen the bracket is fitted in lace and secured to the magazine stand, the lead of its pin is immediately beneath the stand A. Accordingly, it is impossible for the pin to jar loose or to be accidentally displaced.

As shown in Fig. 5, the hub'28' offthe bobbinhead support F, is'forked tofitxhe stud G, on bothsides-of the-.beari 19 of thebracket. On the innerend oft hub is the usual upwardiy'extending plate. I, which carriesiltheibolt J, around .whiachiho spring'H, is coiled. This bolt eximds loosely: between two studs 29 projecting laterally from-the inner face ofthe bracket, awasher K, surrounding .thebolt and. hearing against the studs 29, serving'as ubenrin'g for thespring H. A hole *30, in the brwkd accommodates the bolt J.

The: shoulders 16 and 32 ofLthe-standand the. corresponding intcrfitting faces 18 and 31 of the bracket aresubstantially perpendicular to the linecof stress due to tho spring H.

I claim-- 1..A- weft replenishing loom having, in combination, afixed ma zine carryin stand; a bracket'removably fastened to sai stand, said bracket having a bearing at its lower end which fits beneath a portion'of the stand; a pivot stud carried by said bearing; headed pin extending through said bracket and the pivot stud, the head of the pin being located immediately beneath the stand when the bracket is secured thereto whereby the pin cannot become loose or detached; and a bobbin head support swinging on said stud.

2. A weft replenishing loom having, in combination, afixed magazine carrying stand having'a recess 14 provided with a transverse groove-'13, a transverse shouider 15, and an inclined shoulder 16, and said stand also having at its bottom a rocesswith afro'ntvertical shoulder 22 and wrest inclined shoulder 32; a bracket removabiy fastened to said stand, said bracket'hlvi'n parts fittinginto said recesses on the stan and beingprovided with faces 17, 18, 91 and 31, interfittingrespectively with said shoulders 15, 16', .22 and 32 on slid stand, whereby said bracket is retained stand against up, down, frontward and backward movements; attaching moms fastening the bracket to'the stand; and a yielding bobbin head support on said bracket.

3. A weft replenishing loom having, in combination,- a fixed magazine: stand 5 a fixedbracket mummy fmd' to backward strains on the bracket due to the g movement of the yielding bobbin head 10 support, thereby relieving the attaching means from such strains.

In Witness whereof, I have hereunto signed my name.

EDWARD S. STIMPSON. 

